Architecture check

---

architecture-check

You are a software architect validating that the codebase adheres to its documented architecture.

1. Load Architecture Documentation

Read:

• docs/architecture/ARCHITECTURE.md — documented module boundaries and dependencies
• docs/reference/GROUND_RULES.md — architectural ground rules with enforcement channels (if exists)
• docs/adr/ — architecture decision records (if any exist)
• CLAUDE.md — architecture one-liner

If ARCHITECTURE.md doesn't exist or is a template, inform the user and suggest running /bootstrap or creating one.

2. Validate Module Boundaries

Apply the architectural_impact reasoning tool from .claude/skills/story-cycle/references/reasoning-tools.md to assess module boundaries systematically.

For each documented module/layer:

If the Module Map section contains explicit Dependency Rules (MUST/NEVER statements), use those as the primary validation criteria rather than inferring boundaries from the diagram alone.

Import Analysis

Scan imports to check for violations:

• No cross-layer imports — e.g., presentation layer should not import from data layer directly
• No circular dependencies — module A imports B which imports A
• Dependency direction — imports should flow in the documented direction (e.g., handlers → services → repositories, not reversed)

# Example: Find imports across boundaries
# grep -r "from data_layer" presentation_layer/
# grep -r "import.*handler" repository_layer/

Boundary Check

For each module:

• Does it only depend on modules it's allowed to depend on?
• Are there any "reaching across" imports that skip layers?
• Are shared types/interfaces in the right location?

3. Check for Architectural Drift

Compare the actual code structure against ARCHITECTURE.md:

• New modules — code directories not documented in ARCHITECTURE.md
• Missing modules — documented modules that don't exist (yet or anymore)
• Changed responsibilities — modules doing things outside their documented scope
• Undocumented dependencies — imports between modules not shown in the architecture

3.5. Validate Dependency Rules

If the Module Map section contains Dependency Rules (MUST/NEVER/MAY statements):

For each rule:

1. Parse the rule into: [subject] [MUST/NEVER/MAY] [action] [target]
2. Verify with import analysis: scan actual imports in the subject modules
3. Report violations with file:line evidence

Example: Rule "Controllers MUST only call services" → grep controller directory for imports outside the services layer.

3.7. Check Update Triggers

Read the Update Triggers section. For each trigger, check if recent changes match:

LAST_VERIFIED=$(grep -oP 'Last Verified: \K[\d-]+' docs/architecture/ARCHITECTURE.md 2>/dev/null)
if [ -n "$LAST_VERIFIED" ]; then
    git log --since="$LAST_VERIFIED" --name-only --pretty=format: | sort -u | head -30
fi

Compare changed files against trigger conditions (new top-level directories, new data stores, changed API boundaries). Flag any matches as "Architecture doc may be stale."

3.7b. Validate API Documentation Currency (if API project)

<IF condition="docs/reference/API_DOCUMENTATION.md exists and has populated Operations section (not just template placeholders)">

1. Grep for route/endpoint definitions in the codebase (framework-specific: @app.route, router.get, @RequestMapping, func (h *Handler), etc.)
2. Compare discovered endpoints against documented Operations in docs/reference/API_DOCUMENTATION.md
3. Flag: undocumented endpoints (in code but not in docs), stale documentation (in docs but removed from code)
4. Check consistency: do all endpoints use the documented authentication method? Do error responses follow the documented error format?
5. If an API spec file exists (openapi.yaml, asyncapi.yaml, etc.): verify it is referenced in the API documentation header

Report findings in the output under ### API Documentation Currency. </IF>

3.8. Validate Known Landmines

For each entry in the Known Landmines section:

• If it references a file: verify the file still exists and the described condition is still present
• If it references a pattern: grep for it
• Flag entries that appear to be resolved (file removed, pattern no longer present)

3.9. Validate Ground Rules

<IF condition="docs/reference/GROUND_RULES.md exists and has GR-NNN rules"> Read `docs/reference/GROUND_RULES.md`. For each rule: - **`Enforced-by: review:`** — perform the specified check against the codebase, report violations with file:line evidence - **`Enforced-by: auto:`** — verify the referenced tool/test is configured and running (e.g., ArchUnit test exists, dependency-cruiser config present). Flag unconfigured enforcement as "enforcement gap" - **`Enforced-by: ai:`** — check that recent changes don't violate the ai instruction

Check the Exception Log — any violation covered by a non-expired exception is compliant. </IF>

4. Auto-Generate ADR (if drift detected)

If significant architectural changes are found (new dependency, pattern deviation across 3+ files, deviation from an accepted ADR), generate a draft ADR using the project's template format:

---
status: proposed
date: {today}
decision-makers: []
tags: [{relevant domain tags}]
rejected-options: []
supersedes: {ADR-NNNN if deviating from existing ADR, else null}
superseded-by: null
linked-ground-rules: []
confidence: medium
---

# ADR-NNNN: {Imperative title describing the drift}

## Context

{Describe the detected drift — what changed in the code, what prior decision
(if any) it deviates from, and what forces drove the change. 2-4 sentences
based on evidence from the codebase.}

## Decision

**We will {accept the drift as the new standard / revert to the documented architecture / update documentation to match}.**

{1-2 sentences expanding. Flag as `status: proposed` for human review.}

## Alternatives Considered

### ✅ {The detected approach} (Selected)
- **Why chosen:** {what evidence in the codebase supports this direction}

### ❌ {The prior documented approach}
- **Why rejected:** {what changed that made the prior approach insufficient}
- **Reconsider when:** {conditions under which the original approach would be better}

## Consequences

- **Positive:** {what the drift improves}
- **Negative:** {what risk or cost the drift introduces}
- **Operational:** {what the team must now do differently}

## Compliance

{Suggest a concrete check — grep pattern, test, or review instruction —
to verify this decision is followed going forward.}

Save to docs/adr/NNNN-short-title.md (sequential 4-digit number). Update the Index table in docs/adr/README.md.

Also check existing ADRs for staleness: For each confidence: low ADR, check whether its Reconsider when conditions have been met. Flag any that need review.

ADR-to-ground-rule promotion: If docs/adr/ contains 2+ accepted ADRs addressing the same architectural concern (e.g., repeated boundary violations, recurring dependency decisions), suggest promoting it to a ground rule in docs/reference/GROUND_RULES.md with a back-reference to the ADR. Recurring decisions indicate a missing principle.

5. Suggest Fitness Function Tests

For each architectural rule, suggest a test that can be automated:

Rule	Fitness Function Test
No circular dependencies	Import cycle detection script
Layer isolation	Import direction validation
Module size limits	File/line count per module
API surface area	Public export counting

Output Format

## Architecture Check - [Date]

### Module Boundary Validation
| Module | Dependencies OK | Violations |
|--------|-----------------|------------|
| [name] | YES/NO | [list] |

### Architectural Drift
- [Drift item]: [Documented vs Actual]

### Suggested ADRs
- [NNNN-short-title]: [Brief reason] (status: proposed, confidence: [level])

### ADR Staleness Review
- [ADR-NNNN]: [Reconsider-when condition met? Yes/No — action needed]

### Ground Rules Compliance
| Rule | Level | Status | Evidence |
|------|-------|--------|----------|
| [GR-NNN: name] | MUST/SHOULD | PASS/FAIL/ENFORCEMENT GAP | [file:line or tool status] |

### API Documentation Currency
- [Undocumented endpoints / Stale docs / Consistent — or "N/A (no API detected)"]

### Fitness Function Suggestions
- [Test description]: [What it validates]

### Recommendations
1. [Most important action]
2. [Second priority]